{"id":1208,"date":"2010-04-14T23:07:43","date_gmt":"2010-04-14T15:07:43","guid":{"rendered":"http:\/\/www.slyar.com\/blog\/?p=1208"},"modified":"2014-04-22T13:48:22","modified_gmt":"2014-04-22T05:48:22","slug":"cpp-copy-constructor","status":"publish","type":"post","link":"http:\/\/www.slyar.com\/blog\/cpp-copy-constructor.html","title":{"rendered":"C++:\u590d\u5236\u6784\u9020\u51fd\u6570\u5728\u4ec0\u4e48\u65f6\u5019\u88ab\u8c03\u7528\uff1f"},"content":{"rendered":"<p>\u6587\u7ae0\u4f5c\u8005\uff1a<span style=\"color: #0000ff;\">\u59dc\u5357(Slyar) <\/span>\u6587\u7ae0\u6765\u6e90\uff1aSlyar Home (<a title=\"Slyar\" href=\"http:\/\/www.slyar.com\" target=\"_blank\">www.slyar.com<\/a>) \u8f6c\u8f7d\u8bf7\u6ce8\u660e\uff0c\u8c22\u8c22\u5408\u4f5c\u3002<\/p>\n<p>\u8fd9\u4e2a\u95ee\u9898\u4e0d\u662f\u7591\u95ee\u4e86\uff0c\u67e5\u4e86\u4e00\u4e0b\u56fd\u5916\u7f51\u7ad9\uff0c\u603b\u7ed3\u4e00\u4e0b\u3002\u5047\u8bbePerson\u662f\u4e00\u4e2a\u7c7b\uff0c\u590d\u5236\u6784\u9020\u51fd\u6570\u7684\u8c03\u7528\u4f1a\u5728\u4ee5\u4e0b\u51e0\u79cd\u60c5\u51b5\u4e0b\u53d1\u751f:<\/p>\n<p>1\u3001\u5bf9\u8c61\u5728\u521b\u5efa\u65f6\u4f7f\u7528\u5176\u4ed6\u7684\u5bf9\u8c61\u521d\u59cb\u5316<\/p>\n<p>Person p(q); \/\/\u6b64\u65f6\u590d\u5236\u6784\u9020\u51fd\u6570\u88ab\u7528\u6765\u521b\u5efa\u5b9e\u4f8bp<\/p>\n<p>Person p = q; \/\/\u6b64\u65f6\u590d\u5236\u6784\u9020\u51fd\u6570\u88ab\u7528\u6765\u5728\u5b9a\u4e49\u5b9e\u4f8bp\u65f6\u521d\u59cb\u5316p<\/p>\n<p>2\u3001\u5bf9\u8c61\u4f5c\u4e3a\u51fd\u6570\u7684\u53c2\u6570\u8fdb\u884c\u503c\u4f20\u9012\u65f6<\/p>\n<p>f(p); \/\/\u6b64\u65f6p\u4f5c\u4e3a\u51fd\u6570\u7684\u53c2\u6570\u8fdb\u884c\u503c\u4f20\u9012\uff0cp\u5165\u6808\u65f6\u4f1a\u8c03\u7528\u590d\u5236\u6784\u9020\u51fd\u6570\u521b\u5efa\u4e00\u4e2a\u5c40\u90e8\u5bf9\u8c61\uff0c\u4e0e\u51fd\u6570\u5185\u7684\u5c40\u90e8\u53d8\u91cf\u5177\u6709\u76f8\u540c\u7684\u4f5c\u7528\u57df<\/p>\n<p>\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u8d4b\u503c\u5e76\u4e0d\u4f1a\u8c03\u7528\u590d\u5236\u6784\u9020\u51fd\u6570\uff0c\u8d4b\u503c\u53ea\u662f\u8d4b\u503c\u8fd0\u7b97\u7b26(\u91cd\u8f7d)\u5728\u8d77\u4f5c\u7528<\/p>\n<p>p = q; \/\/\u6b64\u65f6\u6ca1\u6709\u590d\u5236\u6784\u9020\u51fd\u6570\u7684\u8c03\u7528\uff01<\/p>\n<p><span style=\"color: #0000ff;\">\u7b80\u5355\u6765\u8bb0\u7684\u8bdd\u5c31\u662f\uff0c\u5982\u679c\u5bf9\u8c61\u5728\u58f0\u660e\u7684\u540c\u65f6\u5c06\u53e6\u4e00\u4e2a\u5df2\u5b58\u5728\u7684\u5bf9\u8c61\u8d4b\u7ed9\u5b83\uff0c\u5c31\u4f1a\u8c03\u7528\u590d\u5236\u6784\u9020\u51fd\u6570\uff1b\u5982\u679c\u5bf9\u8c61\u5df2\u7ecf\u5b58\u5728\uff0c\u7136\u540e\u5c06\u53e6\u4e00\u4e2a\u5df2\u5b58\u5728\u7684\u5bf9\u8c61\u8d4b\u7ed9\u5b83\uff0c\u8c03\u7528\u7684\u5c31\u662f\u8d4b\u503c\u8fd0\u7b97\u7b26(\u91cd\u8f7d)<\/span><\/p>\n<p>\u9ed8\u8ba4\u7684\u590d\u5236\u6784\u9020\u51fd\u6570\u548c\u8d4b\u503c\u8fd0\u7b97\u7b26\u8fdb\u884c\u7684\u90fd\u662f\"shallow copy\"\uff0c\u53ea\u662f\u7b80\u5355\u5730\u590d\u5236\u5b57\u6bb5\uff0c\u56e0\u6b64\u5982\u679c\u5bf9\u8c61\u4e2d\u542b\u6709\u52a8\u6001\u5206\u914d\u7684\u5185\u5b58\uff0c\u5c31\u9700\u8981\u6211\u4eec\u81ea\u5df1\u91cd\u5199\u590d\u5236\u6784\u9020\u51fd\u6570\u6216\u8005\u91cd\u8f7d\u8d4b\u503c\u8fd0\u7b97\u7b26\u6765\u5b9e\u73b0\"deep copy\"\uff0c\u786e\u4fdd\u6570\u636e\u7684\u5b8c\u6574\u6027\u548c\u5b89\u5168\u6027\u3002<\/p>\n<p>\u8f6c\u8f7d\u8bf7\u6ce8\u660e\uff1a<a href=\"http:\/\/www.slyar.com\/blog\">Slyar Home<\/a> &raquo; <a href=\"http:\/\/www.slyar.com\/blog\/cpp-copy-constructor.html\">C++:\u590d\u5236\u6784\u9020\u51fd\u6570\u5728\u4ec0\u4e48\u65f6\u5019\u88ab\u8c03\u7528\uff1f<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>\u6587\u7ae0\u4f5c\u8005\uff1a\u59dc\u5357(Slyar) \u6587\u7ae0\u6765\u6e90\uff1aSlyar Home (www.slyar.com) \u8f6c\u8f7d\u8bf7\u6ce8\u660e\uff0c\u8c22\u8c22\u5408\u4f5c\u3002 \u8fd9\u4e2a\u95ee\u9898\u4e0d\u662f\u7591\u95ee\u4e86\uff0c\u67e5\u4e86\u4e00\u4e0b\u56fd\u5916\u7f51\u7ad9\uff0c\u603b\u7ed3\u4e00\u4e0b\u3002\u5047\u8bbePerson\u662f\u4e00\u4e2a\u7c7b\uff0c\u590d\u5236\u6784\u9020\u51fd\u6570\u7684\u8c03\u7528\u4f1a\u5728\u4ee5\u4e0b\u51e0\u79cd\u60c5\u51b5\u4e0b\u53d1\u751f: 1\u3001\u5bf9\u8c61\u5728\u521b\u5efa [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[17],"tags":[303,304],"class_list":["post-1208","post","type-post","status-publish","format-standard","hentry","category-programing","tag-303","tag-304"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.2.1 - 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